@import url('http://fonts.gooleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700;800;900&display=swap');
*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
section
{
    position: relative;
    min-height: 100vh;
    background: #557085;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: 0.5s;
}

section.active
{
    background: #3e3f39;
}
section .container
{
    position: relative;
    width: 800px;
    height: 500px;
    background: #fff;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    overflow: hidden;
}
section .container .user
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
}
section .container .user .imgBx
{
    position: relative;
    width: 50%;
    height: 100%;
    transition: 0.5s;
}
section .container .user .imgBx img
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
section .container .user .formBx
{
    position: relative;
    width: 50%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    transition: 0.5s;
}
section .container .user .formBx h2
{
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
    width: 100%;
    margin-bottom: 10px;
    color: #555;
}
section .container .user .formBx input
{
    width: 100%;
    padding: 10px;
    background: #f5f5f5;
    color: #333;
    border: none;
    outline: none;
    font-size: 14px;
    margin: 8px 0;
    letter-spacing: 1px;
    font-weight: 300;
}
section .container .user .formBx input[type="submit"]
{
    max-width: 100px;
    background: #677eff;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: 0.5s;
}
section .container .user.signupBx .formBx input[type="submit"]
{
    background: #e73e49;
}
section .container .user .formBx .signup
{
    position: relative;
    margin-top: 20px;
    font-size: 12px;
    letter-spacing: 1px;
    color: #555;
    text-transform: uppercase;
    font-weight: 300;
}
section .container .user .formBx .signup a
{
    font-weight: 600;
    text-decoration: none;
    color: #577eff;
}
section .container .user .formBx .signupBx
{
    display: none;
}
section .container .signupBx
{
    pointer-events: none;
}
section .container.active .signupBx
{
    pointer-events: initial;
}
section .container .signupBx .formBx
{
    top: 100%;
}
section .container.active .signupBx .formBx
{
    top: 0;
}
section .container .signupBx .imgBx
{
    top: -100%;
    transition: 0.5s;
}
section .container.active .signupBx .imgBx
{
    top: 0;
}


section .container .signinBx .formBx
{
    top: 0;
}
section .container.active .signinBx .formBx
{
    top: 100%;
}
section .container .signinBx .imgBx
{
    top: 0;
    transition: 0.5s;
}
section .container.active .signinBx .imgBx
{
    top: -100%;
}

@media (max-width: 991px)
{
    section .container
    {
        max-width: 400px;
    }
    section .container .imgBx
    {
        display: none;
    }
    section .container .user .formBx
    {
        width: 100%;
    }
    section .container.active .signinBx .formBx
    {
        top: -100%;
    }
}